In this one video I make Asteroids using pure JavaScript. I structured everything so you will completely understand every line of code.

If you want to make games you have to know how to make Asteroids! It requires you to understand moving in a 3D space, collision detection, inertia, velocity, rotating shapes using math instead of rotating the canvas, reacting immediately to user input, animating polygons, creating and destroying objects, trigonometry, and numerous other related topics!

Unlike most everyone I take the time to edit my videos. That means I cover the same amount in 1/3rd of the time. I provide all the heavily commented code below. For best results print it out and pause your way through the video while taking notes. The Asteroids game is available here to play. Continue reading JavaScript Asteroids →

In this part I continue my JavaScript Tutorial and cover the Doomsday Algorithm. I’ll make a JavaScript app that can find the weekday for and date in history and display the steps.

John Conway discovered the Doomsday Rule. He realized that certain dates in every year all share the same week day. If you can then calculate what each years Doomsday is you can then easily find any weekday for any date. All the code follows below. Continue reading JavaScript Tutorial 12 Doomsday Algorithm →